Also, if this data is used in conjunction with the waveforms of the injector pulses, it’s possible to perform cylinder balance and other diagnostic tests. These parameters can tell you what the pressures should be during the different modes of operation. These tools will have the PID parameters for these components as part of the Mode 6 data. This information can be used to diagnose the health of the low-side and high-side pumps. These extremely high fuel pressure levels are required to overcome compression and combustion pressures inside the cylinder and to inject a relatively large volume of fuel directly into the cylinder in a very short amount of time.įactory and enhanced scan tools can monitor pressure transducers on the high and low sides of the system. While specific pressures vary among different vehicle applications, most high-pressure pumps are capable of producing at least 2,000 psi of fuel pressure. The pressure from the high-pressure fuel pump is monitored by the Powertrain Control Module (PCM) through a sensor and can be modulated by changing the volume of fuel entering the pump inlet. This part of the fuel system is called the high-pressure side. This pump is driven off a lobe on the camshaft. A fuel pump on the engine pressurizes the fuel for high-pressure injectors.
Fuel on this side of the system is called the low-pressure side. The in-tank pump in GDI systems is more responsible for volume than pressure. To overcome the cylinder pressures, the fuel pressure supplier to the injector may be as high as 2,000 psi. With the injector in the combustion chamber, the pintle and seat of the fuel injector are under extreme pressures. These repair solutions will cover more than six-million vehicles on the road today.ĭavid Hirschhorn, Director of Brand Management For the power for the switch that you now have coming from the starter, it should be coming from the purple wire, that way the power to the oil pressure switch gets shutoff when the switch is. You have the NO and NC on your drawing reversed, along with the 85 and 86 terminals on the fuel pump relay. In a 45-minute webinar sponsored by CRP Automotive, the company that brings you Rein Automotive, we will cover six common cooling system repairs on BMW, Audi and VW vehicles. Re: Oil pressure Switch Wiring For Fuel Pump. These solutions can simplify a repair and protect against future failures. These parts can create a win/win situation for your shop and customers when dealing with today’s vehicle’s complexity and longevity.
Some replacement parts can be better than the original parts. It could be hoses, plastic couplings or water pumps. Have you ever noticed many European cars and SUVs no longer have coolant replacement intervals listed in the service information? This could be due to cooling systems requiring service or component replacement prior to that interval. As the plunger travels to the right, the fuel entry is cut off, high pressure fuel exits through the outlet passage (shaped like a crescent) into another. Sponsored By CRP Automotive, the company that brings you REIN Automotive